Back to results
US 12,649,823 B2Granted
Lignin based biodegradable polymers and methods of making the same
AssigneeThe Florida State University Research Foundation, Inc.
InventorHoyong Chung
Life of this patent
Estimating the term…
Abstract
Disclosed are biodegradable polyester polymers comprising lignin-containing segments and vegetable-oil based segments. Also disclosed herein are methods of making biodegradable polyester polymers and the articles made from these polymers.
Claims17
A method comprising:
- a) providing a functionalized lignin segment comprising carboxylic functional groups;
- b) providing a vegetable-oil based segment;
- and
- c) forming a biodegradable polyester polymer by forming ester linkages between the functionalized lignin segment and the vegetable-oil based segment;
- wherein the functionalized lignin segment comprising carboxylic functional groups is formed by a method comprising:
- a) providing a lignin having a plurality of hydroxyl groups;
- and
- b) reacting the lignin with a dicarboxylic acid, a derivative of a dicarboxylic acid, or a combination thereof;
- and
- wherein the vegetable-oil based segment is formed by a method comprising an organic base-catalyzed ring-opening polymerization (ROP) of a vegetable-oil based lactone to form an opened ring linear lactone derivative, wherein the ROP occurs in the presence of:
- i) a catalyst;
- and/or
- ii) a catalytic accelerator;
- and/or
- iii) an initiator.
12 more elements
Dependencies are inferred from the claim text.